Some of us might be able to take a few tips from kids when it comes to saving money. A new study shows children who get an allowance save 42% of their money on average. This is based on a study of 30,000 4 to 14-year-olds by Rooster Money. The study shows about 70% of parents say they give their children an allowance. The average pay is just over $9 a week. Washing the car, gardening and cleaning their rooms [